S-methylmethionine reduces cell membrane damage in higher plants exposed to low-temperature stress

Ilona Rácz, Emil Páldi, Gabriella Szalai, Tibor Janda, Magdolna Pál, Demeter Lásztity

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26 Citations (Scopus)


S-methylmethionine (SMM), an important intermediate compound in the sulphur metabolism, can be found in various quantities in majority of plants. The experiments were designed to determine the extent to which SMM is able to preserve cell membrane integrity or reduce the degree of membrane damage in the course of low-temperature stress. By measuring electrolyte leakage (EL), it was proved that SMM treatment reduced cell membrane damage, and thus EL, during low-temperature stress in both the leaves and roots of peas, maize, soy beans and eight winter wheat varieties with different levels of frost resistance. Investigations on the interaction between SMM and polyamine biosynthesis revealed that SMM increased the quantities of agmatine (Agm) and putrescine (Put) as well as that of spermidine (Spd), while it had no effect on the quantity of spermine (Spn). Using a specific inhibitor, methylglyoxal-bis-guanyl hydrazone (MGBG), it was proved that the polyamine metabolic pathway starting from methionine played no role in the synthesis of Spd or Spn, so there must be an alternative pathway for the synthesis of SMM-induced polyamines.

Original languageEnglish
Pages (from-to)1483-1490
Number of pages8
JournalJournal of Plant Physiology
Issue number14
Publication statusPublished - Sep 29 2008



  • Electrolyte leakage
  • Low-temperature stress
  • Polyamines
  • S-methylmethionine

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

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